diff --git a/Models/DeviceComparisonResult.cs b/Models/DeviceComparisonResult.cs
index 58609d9..77f73e9 100644
--- a/Models/DeviceComparisonResult.cs
+++ b/Models/DeviceComparisonResult.cs
@@ -30,6 +30,11 @@ namespace Disco.Plugins.ADCompare.Models
         public int DevicesNoAssignment { get; set; }
         public int DevicesNoManagedBy { get; set; }
         public int DevicesADDisabled { get; set; }
-        public List<DeviceComparisonResult> Results { get; set; } = new List<DeviceComparisonResult>();
+        public List<DeviceComparisonResult> Results { get; set; }
+
+        public DeviceComparisonSummary()
+        {
+            Results = new List<DeviceComparisonResult>();
+        }
     }
 }